Windows Vista, 64-bit. I purchased a Dell Optiplex Micro 5000 computer which came with a SK Hynix SODIMM 8GB (HMAA1GS6CJR6N) memory module. But only with another 2 core processor. A09, 3/11/2008. 50w RX 6400. Example:Crucial Memory and SSD upgrades - 100% Compatibility Guaranteed for Dell OptiPlex 755 Series (Desktop Mini-Tower and Small Form Factor) - FREE US Delivery. OS Name Microsoft Windows 7 Home Premium. Copy current url to clipboardHowever, is says the minimum watt supply requirement for this GPU is 400 Watts. Table 4. 5-inch drive bay 4 USB 2. Good day Sirs, I have Mini Tower OptiPlex 755 with 0GM819 motherboard. Why does crucial recommend a higher maximum ram limit for my system than the system manufacturer? At Crucial®, we ensure that the higher amount of RAM is rigorously. I checked each stick, and individually they work, just not as a pair. Jun 22, 2016. Crucial Memory and SSD upgrades - 100% Compatibility Guaranteed for Dell OptiPlex 7020 (Mini-Tower) - FREE US Delivery. i own an optiplex 755 and just did install a q9550 after updating bios to a20 and the thing is a rocket now,video card is a gt220(hdmi out to 32"lcd sony bravia) and 4gb of ddr2 800mhz ram. com says 16GB for the SFF and they guarantee their kits to work. For best Optiplex 755 Small Form Factor Computer performance use the maximum amount of 16GB, fill all the slots with the max allowed memory per slot for your Computer. I have recently acquired a Optiplex 755 DT. Buy some contact cleaner and spray the RAM contacts as these desktops love to complain about RAM fault when RAM contacts go bad. Below memory compatibility will be DDR3 unless stated otherwise. Diagnostic lights 3,4 indicate a RAM problem. 10 A22 T tonschkDell Optiplex Memory RAM Upgrade install is the easiest and economical way to make this Dell Optiplex 780 Mini-tower computer super fast. It might not be obvious to you yet, but it's pretty obvious the 755 can't take i7's, AMD Ryzen, and etc. Isso é algum problema de configu. Mmansueto. Safely scan your system for max upgrade options. 0GHz 4GB 160GB Windows Pro. Optiplex 755 DDR 2 Ram question. WIN10 New 28 Aug 2022 #1. 64bit Windows 7 ultimate (toying with a win 10 Pro ssd upgrade) 2 x 2gb ddr3-1066 sdram. So, I tried a kingston value ram of 4gb @ 1333M. The GPU's coming with the optiplex are ***. DDR4-2666 • CL=19 • NON-ECC • UDIMM • 288-pin • 1. I have multiples of the Optiplex 755 and XPS 420's- They're great little machines for virtualization. Small Business. Slots: 4. The 780 takes either 1,066MHz or 1,333MHz RAM. A-Tech 8GB (4X 2GB) Max Memory RAM Kit for Dell OptiPlex 755, 745, 740, (MT, DT, SFF) - DDR2 667MHz PC2-5300 Non-ECC DIMM Upgrade 667 MHz 240-Pin 4. I checked the system resources and it showed the correct amount of RAM. Select the department you want to search in. I have two Optiplex 755 SFF running VMware ESX 4. sp. Free postage. 0. 15,010. Dell Optiplex 755 RAM issues. I'm looking to upgrade my computer so i can max out its ram and was wondering if this ram will fit. 2 slot supports 4X. The OptiPlex 755 supports the Intel Core 2 Quad, Intel Core2 Duo, Intel Pentium dual-core, Intel Celeron processors based on Intel's 775-pin (LGA775) socket. DELL OPTIPLEX 960 Professional users seeking a sophisticated, powerful desktop need to look no further than the OptiPlex 960. normally on a OptiPlex 755 (and you need to confirm this by looking inside the case) the system has 4 slots for ram, ands 8GB is the highest in 99% of cases for 775 CPUs' thus DDR-800/667 being the two possible speeds used on the said motherboard. I want to extend the memory to maximum Can anybody clearify this Statement from the product brief: "Delivers up to 12. You're welcome. yes it is true, i still use my original dell optiplex gx280, 10+ years old. 8GHz Intel Celeron 430 n/a Serial ATA RAID, Ultra ATA/100 PCI/PCI Express 16x 80. Max memory for Optiplex 780. – TJJ. Also for: Optiplex. I've taken a humble Optiplex 755 Desktop chassis, upgraded the RAM to 4gb, upgraded the HD to a 60gb OCZ Vertex 2E Solid State Drive, added a PCI-E full-height riser, and upgraded the graphics card to the maximum possible that would fit into the case. Example: Crucial Memory and SSD upgrades - 100% Compatibility Guaranteed for Dell OptiPlex 755 Series (Desktop Mini-Tower and Small Form Factor) - FREE US Delivery. Most dell computers have code in the bios firmware that checks on the memory brand, and sets a flag, if non crucial memory is detected. FREE delivery Fri, May 19. At Mr Memory you get enhanced speed and peak performance with every upgrade, taking your device to the limit. The stylish new OptiPlex 960 delivers advanced technologies to tackle any challenge without missing a beat. Memory modules should be installed in pairs of matched memory size, speed, and technology. N650J 2. Dell Poweredge T430 Motherboard in a T420 box? 17. RAM - 6GB DDR2. Nov 22, 2016 Should be 16 gb max source :more info here You have to choose between 2 x 8 gb ddr2 OR ddr3 because you cannot mix them. DDR3 and DDR3L are socket compatible, however, It is NOT compatible with computers using 4th Generation Intel (Haswell) processors, which exclusively support 1. ) - it is much slower than when first purchased. I have heard conflicting info that either 4gb or 8gb is the max it can handle. There are 2 slots so you can put 4GB in each of the slots. Pregunta sobre memoria ram en Dell Optiplex 755. 2 GB of DDR3 GPU memory with fast bandwidth enables you to create large, complex 3D models, and a flexible single-slot and low-profile form factor makes it compatible with even the most space and power-constrained chassis. 4. I want to extend the memory to maximum Can anybody clearify this Statement from the product brief: "Delivers up to 12. Memory Type: DDR2 PC2-8500, DDR2 PC2-6400, DDR2 PC2-5300, DDR2 (non-ECC) Maximum Memory: 8GB. 0 ports, whereas Dell Optiplex 780 features 8 USB 2. . or Best Offer. ¿. EUR 23. Search. The maximum amount of graphics memory will depend on the computer's Chipset. MP627 2. How many RAM slots does an OptiPlex 755 have? The Computer has 4 Slots to install memory, already with 2GB standard memory installed. Random Access Memory (RAM) is a type of hardware that your computer uses to store information. 8 Gb/s (DDR2 800 dual 6. Alienware Desktops. 66GHz Yorkfield Quad Core Q9400, 6MB, 1333FSB, R0. These are the Quads we validated -. 3. I have multiples of the Optiplex 755 and XPS 420's- They're great little machines for virtualization. 25 (2 new offers) 8GB (4GBx2) Team High Performance Memory RAM Upgrade For Dell OptiPlex 210Ln 745 Series (Desktop Mini-Tower and Small Form Factor). SAMSUNG 870 EVO SATA. Sign In Upload. 2V • 1Rx8 • PC4-21300. 32Gb. 17-03-2021 20:00 PM. 6Ghz cpu and 2Gb ram. 2GB 240-pin PC2-5300 DDR2-667 non-ECC non-Registered DIMM. The max memory this has is 8192 mb. 4. Moon Township Gaming Desktop PC. GTX 750Ti and Q9650 will work great together. 731 / 6. Good day Sirs, I have Mini Tower OptiPlex 755 with 0GM819 motherboard . (hdd can upgrade to ssd. Enter model or choose from the list below. A seagate 500GB HDD and (originally) 4GB of Samsung PC2-5300U DDR2 ram in a 4x1 configuration. 66Ghz, 95w and 1333mhz bus speed. Starting at CAD $599. Difference from the Quad's in 780 to the E6850 is minimal for your real life performance. - SkillBench (space shooter). This computer supports maximum memory speed of 800MHz DDR2 SDRAM. Aurora R4, computer won’t boot with Intel Xeon E5 2697 v2 in LGA2011 socketOptiPlex 790 Desktop. 66 GHz Intel Dual Core CPU and having a front side bus of 1333 MHz. The 95W CPU limit keeps the Extremes out, and I even tried a 75W X6800 in another Dell and it wouldn't run either. OptiPlex 160L. Crucial Scanner. Dell Support Forums: Dell Desktops Forum: Dell Desktops Community Support Forums all models: Max processor and ram for the Mini-tower optiplex 755 (BIOS A17)DELL™ optipLEx™ 755Optiplex 755 DT Hardware Upgrade. Then we started Windows, only 256MBs of Ram out of the 8GBs was available (the OS told us). I'm going to buy my first Dell computer, which is a Dell Optiplex 755 Small Form Factor. My upgrade will be: CPU - AMD Athlon 3000G. $999. Dell uses proprietary I/O front cables, headers, and control boards. Buy Kingston Dell Optiplex 755 USFF/Ultra Small Form Factor Desktop Memory RAM & SSD upgrades. Add to Cart. Graphics. 5: wait 15minutes, this further discharges huge capacitors inside. OptiPlex 755 Advanced REMOTE IT Management Dell OptiPlex 755 offers enhanced management and control with Intel® vPro™ processor technology, giving IT staff excellent flexibility, high efficiency, and reduced desktop-side troubleshooting. As far as the the CPU goes, the C2Q Q6700 is compatible with your SFF. Max Memory Memory Compatibility; OptiPlex 3010 (MT, DT, SSF, USFF) 2: 8 Gb: 1333/1600MHz: OptiPlex 7010 (MT, DT, SFF) 4: 16 Gb: 1333/1600MHz: OptiPlex 7010 (USFF) 2:It's an Optiplex 755 SFF with windows 10 64bit, so I'm going with 8GB ram (2 x 4), an SSD in place of the old HDD. Tangerang Selatan ICA JAYA MANDIRI. 25-03-2011 13:00 PM. 83GHz Yorkfield Quad Core Q9550 12MB, 1333FSB, E0. Crucial Scanner. 0. 0 5 Dell™ optiplex™ 755 technical guiDe 5 front view 1 5. Patriot Signature 4GB 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Desktop Memory Model PSD24G8002Memory speed issue after Optiplex 755 Memory Upgrade. Dell Optiplex 755 Tower - 400GB HDD, 4GB Ram, DVD-Rom, 17in LCD Monitor, Windows XP Professional (Renewed) DELL OptiPlex, Intel Core 2 Duo 2. However, is says the minimum watt supply requirement for this GPU is 400 Watts. Re: Dell Optiplex 755; picky with memory Mixing RAM brands/specs commonly results in problems. In reference to processor upgrade, Dell has only tested Optiplex 755 with the Intel Core2 Quad, Core2 Duo, Intel Pentium dual-core, Intel Celeron processors based on Intel's 775-pin (LGA775) socket. 8v,Non-ECC. PC Dell optiplex 755 Slim Core 2 Duo HDD 250gb ram 3gb. 83GHz Yorkfield Quad Core Q9550 12MB, 1333FSB, E0. I would like to upgrade to 8 GB by. The My Computer properties show 3. -. Business. If I just move my old hard drive, RAM, video card and tel-fax modem card into the replacement Opti 755, will it work? I did this once before, six years ago, and I recall that this involves msoobe. unfortunately not possible if you want to use the 755 MT case which is BTX and only accommodates BTX motherboard. I have decided to expand the ram and I plugged in free slot available new memory, Transcend ram 4GB 1rx8 ddr3 1333u. Memory Type: DDR2 PC2-8500, DDR2 PC2-6400, DDR2 PC2-5300, DDR2 (non-ECC) Maximum Memory: 8GB. 2 posts · Joined 2008. Upgrade Finder. Even if the BIOS update is from 2007 like mine. Required Ram is based on Front Side Bus. The Optiplex 755 system has four variants: Ultra small form factor, Small form factor, Desktop, Mini-tower. Hi, I've got an Optiplex 755, 0pu052 motherboard, currently running 2 1 gb ddr2 667 mhz ram sticks, windows xp pro 32 bit, and would like to increase to 4GB the limit of 32 bit. 667-MHz or 800-MHz DDR2 SDRAM. After 15 seconds, connect the power cable to the computer. Speed was pretty good though. Small Business. Windows finished installing. 8. 93 GHz, BIOS is A16 8/16/2013, installed memory is 4GB. Dell Latitude 3570 Win 11 i5 8GB 200GB SSD 15. Kisianik, you said a 750 ti would be appropriate for Dell Optiplex 755. You get a 4x4GB kit requirement for your Dell OptiPlex 7010 MT system. Monroville Dell Poweredge R715 server. Tengo una Dell Optiplex 755 que viene de fabrica con 4Gb de RAM de 667MHz, pero tengo entendido que esta solo soporta hasta 8Gb de RAM con una frecuencia de 667 MHz a 800MHz, entonces yo se la quiero mejorar a 8 Gb pero no se cual comprar ya que ya he probado con unas memorias ddr2 de 800MHz pero no arranca la. DELL-2GB-DDR2-667D. NOTE: Win 7 Home Premium, 64-bit, can support up to 16 GB of RAM, assuming the PC's hardware and BIOS can support 16 GB of RAM. To get the max out of my 755 MT: CPU = C2Q Q9650; RAM = 8GB; OS is on a Crucial SSD. Windows Vista, 32-bit. I went with two 800MHz 512Mb PC2-6400 Kingston KTD-DM8400C/512 CL-5 sticks, supposedly compatible with Optiplex 755. Dell OptiPlex DDR3 Memory Compatibility Guide Reference the DDR3 Memory Compatibility Guide for the Dell OptiPlex series. #5. A very short, very. Memory RAM for Optiplex 755 Ultra Small Form Factor. Tip: Make sure all the sticks are the same brand, capacity, and MHz. I just bought a couple cheap dell optiplex 755s off craigslist to use as servers (the 6550 Intel Core2 dual core ones). 6" Laptop-#B24. Yet another working Optiplex 390 MiniTower setup with 16GB of RAM. Intel Celeron 430 (1. Specs: DDR2 PC2-8500 • CL=7 • Unbuffered • NON-ECC • DDR2-1066 • 1. 115. Optiplex's 755, 790, 7010. CMS 2GB (1X2GB) DDR2 5300 667MHZ Non ECC DIMM Memory Ram Upgrade Compatible with Dell® Optiplex 210L 320 330 740 745 755 Memory Ram Upgrade - A89 4. Small Business. I just bought an Optiplex 7010 from Dell Outlet, and have a question. Maximum Memory; 16GB: Memory Expansion Slots / Banks; 4 Slots: Memory Type & Info; PC2-5300/6400 DDR2 SDRAM DIMM Intel Q35 Express Chipset. I know the maximum is 8GB, but would this work? I would like 8GB but my budget isn’t in heights for this older system. Maximum memory: 8GB Standard memory: 1 or 2GB removable All compatible upgrades DRAM Internal SSD External SSD Filter Internal SSD for: OptiPlex 755 Series (Desktop. Select your OptiPlex model. Is it possible to upgrade my Q6600 cpu to a Q9550 / Q9650? I know that there is no Q9550/Q9650 on the Compatibility list, but i've seen somebody putting that CPU. I'll buy my first Dell computer, which is a Dell Optiplex 755 Small Form Factor. Unsupported certainly doesn't always mean not working. the modern intel motherboards are almost all ATX (or proprietary). I would like to get input from other people that use the Optiplex 755 and get some input on what they recommend upgrading on the system to make it more of a personal. 000. 5" (SATA) SSD Interface: SATA 3. Forget it, running a HD7750 card on a Dell 280w PSU is going to cause nothing but trouble and possibly damage the PC. I want to extend the memory to maximum. 4 out of 5 stars 14 ratings. 0GHz, a Radeon HD 7750 , Samsung 840 SSD, 8GB RAM. It will only run. $50. O. DELL™ OPTIPLEX™ 760 TECHNICAL GUIDEBOOK V1. DellThe ASUS GT740-2GD3-CSM 2GB is a 75W card so it does not need an AUX power connection and works fine with 305W Tower power supply. The only way I know to fix it if you want to pursue it is to return the RAM you just bought. just replaced 2x512mb memory and purchased 4x1gb (max for four slots) ddr2, PC2-. According to Dell's Optiplex site. If you're running Win 7 Home Premium, 64 -bit, then the limit should be 8 GB of RAM in this system. The latest, the Dell OptiPlex 7760 All-in-One (starts at $1,289; $1,983 as tested), continues Dell's dominant run of AIO business desktops. 0 1 x DVI: Operating System: Windows. 9. The Q9650 has 4 cores versus the E8600's 2-- as well, it has twice the cache (12MB vs 6MB), both fit the LGA775 socket, and the Q9560 can be overclocked. Some compatible GPU's: 30w GT 1030 GDDR5. Dell Support Driver and Downloads not offering manual downloads for my. 100. So, again, there's no 8GB total RAM limit with the H61 Express Chipset. PC Dell optiplex 755 Slim Core 2 Duo HDD 250gb ram 4gb. I would like to get input from other people that use the Optiplex 755 and get some input on what they recommend upgrading on the system to make it more of a personal. That's why higher than 8GB is. Lifetime warranty on all Memory / RAM. Find Replacement Memory (RAM) for your Dell computer by selecting the product brand and/or model to find parts compatible with your Dell device. 5 out of 5 stars 15 Yes, crucial brand ram from genuine micron factories is about the only memory that will ever work in a dell computer. Question Maximum number optical. My current specifications are as follows: CPU - Intel Core2 Duo E6550 @ 2. x Just about any cheap NVIDIA late-model PCIe video card. Q9500 - Almost as cheap as dirt. 0. Actually, what he's saying is that the PC2-8500 will not run at its advertised speed in any non-tweakable OEM system such as that Optiplex. 755 never came with win7 / 7 drivers/ 7 COA from dell. When setting up, Dell recommends that you: Connect to a network for Windows updates. Example:11-10-2014 06:00 AM. Dell OptiPlex 755, like many other OptiPlex in this era, uses BTX standard (Inverted ATX), so no ATX and ITX family motherboards (even Micro ATX or Mini ITX) will FIT! Max RAM is 8GB (4x2GB). So I guess this should be high density. upgrading RAM on OptiPlex 755 with 0GM819 motherboard. Dell OptiPlex Tower or Small Form Factor Cable Cover Dell 24 Monitor P2417H Dell Wireless Keyboard and Mouse KM636 Dell Pro Stereo Headset UC350. $64. I have an Optiplex 760 x-64 running Win10 Pro that's using up 71-85% of memory with minimal applications (email, Adobe Reader, Win Office, etc. Often I've found those "maximum" specs to be based on the largest dimm available at the time of publish, and not necessarily a system limitation. A 780 can take a Q9650 Intel Core 2 Quad 3. With 1333FSB Likely the ram will clock down to 800MHZ aka PC2 6400. GX150 = Pentium 3 or Celeron with 512 megs max pc133 SDRAM. 4. GX620= Pentium D or Pentium4 with 4 GIGS max DDR2 RAM = $100 or less in many places. Hello everyone, I would like to give a last upgrade to my old Optiplex 755 buying 8 Gbyte of ram. Thank u for reply So what kind Of Ram Matches this computer ? i see some people using a 12gb ram In dell755KVR800D2N5K2/4G is HIGH Density Ram. 4. PC2-6400 would be preferable if you are using the IGP. SAMSUNG 870 EVO SATA III SSD 1TB 2. If I insert one 2 GB and one 1 GB, then the BIOS detects. $50. RAM Upgrades Overview | OptiPlex 755 with CompuRAM max up to 8GB . Power figures for DELL Optiplex 755 Mini Tower. EDIT: Screengrabs below will show 1,600MHz RAM, which is what came up on the Crucial site for the 780. $64. 25-01-2019 18:00 PM. Three-Step Upgrade Selector. Optiplex 755. Description Values. 0Gb/s • 540 MB/s Read, 500 MB/s Write. This Dell Computer can take up. Be sure to avoid KVR (Kingston Value RAM), as this has caused problems in Dell's. OptiPlex Desktops & All-in-Ones; Inspiron Desktops & All-in-Ones. 350 MHz / 450 MHz / 525 MHz / 650 MHz. Yes, that's an i7-2600 SR00B in there! All appears to be going well, but it's only the first day with 16GB. 512 MB, 1 GB, or 2 GB non-ECC. pretty simple way to make a fast computer even faster. 6: POWER cord back now. Create & edit digital content. Dell Optiplex 755 Full-Tower Desktop Specs and Details. OptiPlex Desktop Computers - OptiPlex business desktop computers offer space-saving features, advanced security, manageability and are a choice for everyday commercial. I want to upgrade my processor to the Core 2 Quad Q9650. #3. I wanted to add just a small SSD as a boot drive and keep the HDD for storage, but it is a SFF and that HDD in that big tray with a fan takes up a ton of room. 4 Gig dimms are priced in the $200 each rang. 5783 05-02-2017 18:00 PM upgrading RAM on OptiPlex 755 with 0GM819 motherboard Good day Sirs, I have Mini Tower OptiPlex 755 with 0GM819 motherboard. FREE delivery Mon, Nov 13 . Thanks for your help so far, I really appreciate it. 30,340. View PDF. optiplex 755 usff video card upgrade I have an Optiplex 755 usff that I got from my school and it was in a perfect condition and it came with 2 GB of RAM for max RAM and it came with the disc drive so that I could read and write DVDs and CDs. Posts / Dell Community / Desktops / Optiplex Desktops / Dell Optiplex 755 RAM issues . 3: then push power button with line AC cord not connected. Kingston high quality Dell OptiPlex 755 DT/MT/SFF Desktop upgrades. Max memory for Dell Optiplex 3010 ? Ahazuerus; Jan 29, 2023; Memory; Replies 10 Views. Dell Optiplex 755 SFF - How to: Maximum Performance? Dear Dell Users. *Important Information: System Memory and Graphics: Significant system memory may be used to support graphics, depending on system memory size and other factors. 0. You can identify the OptiPlex 755 by looking for the Dell logo on the front or side of the device. Thanks to Dell s innovative approach to scalable remote client management, the OptiPlex 755 offers you a choice. 88 Usable) Operating System: Windows 11 Pro. Device Management. 8V • 256Meg x 64 •. Memory connectors. The standard-sized hard drive and optical drive bays can accept any type of SATA drive, so you can repair and upgrade these components easily. Dell Optiplex 755: 32bit or 64bit. The memory speeds supported include 667 and 800 MHz DDR2 memory. Or fastest delivery May 16 - 17. 4GB Stick for Dell Optiplex Series 990 (Mini Tower) 990 (Small Form Factor) 990 (Ultra Small Form Factor). C. Maximum Graphics Memory on Windows® 10: Intel® UHD Graphics: Limited by OS to one-half of System Memory: Intel® Iris® Plus Graphics: Limited by OS to one-half of System Memory: Intel® UHD Graphics 620/630: Limited by OS to one-half of System Memory: Intel® UHD Graphics 600/605: Limited by OS to one-half of System. PC2 8500 is the fastest DDR2 Ram available. 99 New; $55. 5-inch internal SSD • SATA 6. Optiplex 755 desktop pdf manual download. 1. So I guess this should be high density. Hi, I recently purchased a new Dell Optiplex 755 with an E6750 2. 0. 4. I've taken a humble Optiplex 755 Desktop chassis, upgraded the RAM to 4gb, upgraded the HD to a 60gb OCZ Vertex 2E Solid State Drive, added a PCI-E full-height riser, and upgraded the graphics card to the maximum possible that would fit into the case. model 0HX555 revision unknown serial. Top Solutions. 30w-47w Quadro's P400, 600, & 1000. Install modules in. (example: DDR3L) DDR3 is not backward-compatible with DDR2. and I want to upgrade my RAM in case of use optimally FSB (MHz). By tech_guy in forum Hardware. MT, SFF, AIO). The computer slows down often and I assume it is because of memory issues and I. Above Optiplex's are a little less old. Only one thing changes RAM speed. 4. I'm going to suggest have at least 8GB for Win10. 2: M. 99. 8 Gb/s (DDR2 800. This video shows St. 25-inch drive bay 2 5. 66 GHz Intel Dual Core CPU and having a front side bus of 1333 MHz. Dell part numbers = DW1P4 2GB,800MHz,256X64,256X64,Unbuffered,DDR2,240 Pin,Dual Rank,1. 6 Sustainable Materials 60%Dell Optiplex Desktops Support Forum. If it's already in that mode, try another. pretty simple way to make a fast computer even faster. The list spans from 1996 to 2023 and includes CPU compatibility, chipset type, number of memory slots, maximum ram and the ram speed. I want to upgrade my processor to the Core 2 Quad Q9650. Buy Now Payment Secure transaction Ships from A-Tech Components Sold by A-Tech Components Returns Eligible for Return, Refund or Replacement within 30. Please note: If you are upgrading your Dell Desktop/Workstation to more than 4 GB, you will need a 64-bit operating system to take full advantage of this capacity. Q6600 - Cheaper than dirt. If you are using a 64-bit operating system, your computer will support a maximum of 8 GB (2-GB DIMMs in each of the four slots. Crucial Memory and SSD upgrades - 100% Compatibility Guaranteed for Dell OptiPlex 755 Series (Desktop Mini-Tower and Small Form Factor) - FREE US Delivery. This is just a guess though I am not Dell engineering and I don't have a Cpu to test. 10GHz 3.